Colours of cars II

This task is about creating and then reading information from a bar graph.

Alex watched 100 cars go past his gate and wrote down how many cars of each colour went by.

This is what he found.  

White – 29 Yellow – 9
Red – 27 Blue – 6
Grey – 15 Green – 3
Black – 10 Orange – 1
 a)
 Complete the bar graph below to show Alex's results.
Remember to label both axes.
 
 
Colour of cars passing Alex's gate
 
 
b) If all the cars were lined up in the order of their colour (the order shown in the bar graph above), with all the white cars first, all the red cars second, all the grey cars third, and so on, what would be the colour of ...
 
 i) the 25th car? ____________________
 
ii) the 50th car? ____________________
 
iii) the 75th car? ____________________